Relationships between cephalopod’s abundance and environmental parameters in the SW Atlantic
Roi Martinez (AWI) and Julio Portela (IEO)
Study Area
- AREA 1: High seas of the SW Atlantic beyond Argentinean EEZ and north of the Falkland Islands Conservation Zones (FICZ-FOCZ)
- AREA 2: Falkland Islands Conservation Zones (FICZ-FOCZ)
Working Group on Cephalopod Fisheries and Life History (WGCEPH). Lisbon, 16-19 June 2014
Cephalopod species
- Argentine shortfin squid (Illex argentinus)
- Patagonian squid (Doryteuthis gahi, formerly Loligo gahi)
Data
Fishery Data (2010-2013):
- Log books (CPUE) filled in by captains of Spanish trawlers and provided by the Spanish General Secretariat for Fisheries (SGP)
Environmental Data:
- Bathymetry (GEBCO)
- Slope - Aspect - BPI
- Geographical data (latitude, longitude)
- Oceanography data (SST, Chlorophyll, etc)
Working Group on Cephalopod Fisheries and Life History (WGCEPH). Lisbon, 16-19 June 2014
Bathymetry
Area 1: High Resolution Bathymetry Total Area : Lower Resolution Bathymetry
Bathymetry: Derived Datasets
No significant slope in the fisheries areas
No significant faces orientation in the areas
SAME ANALYSIS WITH THE HR BATHYMETRY
Working Group on Cephalopod Fisheries and Life History (WGCEPH). Lisbon, 16-19 June 2014
Sea Surface Temperature 2013
Winter Spring Summer Autumn
Maybe different Season Months Selection???
Image provided by Physical Sciences Division, Earth System Research Laboratory, NOAA, Boulder, Colorado, from their Web site at http://www.esrl.noaa.gov/psd/.
Chlorophyll Distribution
Time Series netCDF dataset by NOAA (To include)
Working Group on Cephalopod Fisheries and Life History (WGCEPH). Lisbon, 16-19 June 2014
Analysis 2013 Logbooks
lat lon depth op_num fish_time catch_kg
Minimum 53.10 63.48 -1441.0 0.000 0.0 0
1
stQuantile -50.17 -60.87 -208.0 2.000 13.0 168
Median -46.95 -60.68 -157.0 3.000 20.0 936
Mean -48.14 -60.77 -187.4 2.709 351.6 5459
3
rdQuantile -46.25 -60.43 -135.0 3.000 700.0 5839
Maximum -41.85 -56.83 -58.0 6.000 1535.0 83722
The dimension of the table is 4630 files by 11 columns.
Data Exploration
Working Group on Cephalopod Fisheries and Life History (WGCEPH). Lisbon, 16-19 June 2014
Data Exploration
Doryteuthis gahi by Season and environmental parameters
Data Exploration
Working Group on Cephalopod Fisheries and Life History (WGCEPH). Lisbon, 16-19 June 2014
Doryteuthis gahi correlation between environmental parameters
Data Exploration
Methodology
- Geographic Information Systems (GIS)
- Data Exploration:
- Cluster Anlysis: (Supervised and not supervised methods) . Hierarchical Models, K-means ,
SOM (Self Organized Maps)
- Prediction tools:
- Neural networks (NN) : Feedback algorithm
- Decision Trees: CART
Working Group on Cephalopod Fisheries and Life History (WGCEPH). Lisbon, 16-19 June 2014
